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#!/usr/bin/env python
# Copyright 2016 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Bootstrap script to clone and forward to the recipe engine tool.
***********************************************************************
** DO NOT MODIFY EXCEPT IN THE PER-REPO CONFIGURATION SECTION BELOW. **
***********************************************************************
This is a copy of https://github.com/luci/recipes-py/blob/master/doc/recipes.py.
To fix bugs, fix in the github repo then copy it back to here and fix the
PER-REPO CONFIGURATION section to look like this one.
"""
import os
#### PER-REPO CONFIGURATION (editable) ####
# The root of the repository relative to the directory of this file.
REPO_ROOT = os.pardir
# The path of the recipes.cfg file relative to the root of the repository.
RECIPES_CFG = os.path.join('infra', 'config', 'recipes.cfg')
#### END PER-REPO CONFIGURATION ####
BOOTSTRAP_VERSION = 1
import ast
import logging
import random
import re
import subprocess
import sys
import time
import traceback
def parse_protobuf(fh):
"""Parse the protobuf text format just well enough to understand recipes.cfg.
We don't use the protobuf library because we want to be as self-contained
as possible in this bootstrap, so it can be simply vendored into a client
repo.
We assume all fields are repeated since we don't have a proto spec to work
with.
Args:
fh: a filehandle containing the text format protobuf.
Returns:
A recursive dictionary of lists.
"""
def parse_atom(text):
if text == 'true': return True
if text == 'false': return False
return ast.literal_eval(text)
ret = {}
for line in fh:
line = line.strip()
m = re.match(r'(\w+)\s*:\s*(.*)', line)
if m:
ret.setdefault(m.group(1), []).append(parse_atom(m.group(2)))
continue
m = re.match(r'(\w+)\s*{', line)
if m:
subparse = parse_protobuf(fh)
ret.setdefault(m.group(1), []).append(subparse)
continue
if line == '}': return ret
if line == '': continue
raise ValueError('Could not understand line: <%s>' % line)
return ret
def get_unique(things):
if len(things) == 1:
return things[0]
elif len(things) == 0:
raise ValueError("Expected to get one thing, but dinna get none.")
else:
logging.warn('Expected to get one thing, but got a bunch: %s\n%s' %
(things, traceback.format_stack()))
return things[0]
def main():
if sys.platform.startswith(('win', 'cygwin')):
git = 'git.bat'
else:
git = 'git'
# Find the repository and config file to operate on.
repo_root = os.path.abspath(
os.path.join(os.path.dirname(__file__), REPO_ROOT))
recipes_cfg_path = os.path.join(repo_root, RECIPES_CFG)
with open(recipes_cfg_path, 'rU') as fh:
protobuf = parse_protobuf(fh)
engine_buf = get_unique([
b for b in protobuf['deps'] if b.get('project_id') == ['recipe_engine'] ])
engine_url = get_unique(engine_buf['url'])
engine_revision = get_unique(engine_buf['revision'])
engine_subpath = (get_unique(engine_buf.get('path_override', ['']))
.replace('/', os.path.sep))
recipes_path = os.path.join(repo_root,
get_unique(protobuf['recipes_path']).replace('/', os.path.sep))
deps_path = os.path.join(recipes_path, '.recipe_deps')
engine_path = os.path.join(deps_path, 'recipe_engine')
# Ensure that we have the recipe engine cloned.
def ensure_engine():
if not os.path.exists(deps_path):
os.makedirs(deps_path)
if not os.path.exists(engine_path):
subprocess.check_call([git, 'clone', engine_url, engine_path])
needs_fetch = subprocess.call(
[git, 'rev-parse', '--verify', '%s^{commit}' % engine_revision],
cwd=engine_path, stdout=open(os.devnull, 'w'))
if needs_fetch:
subprocess.check_call([git, 'fetch'], cwd=engine_path)
subprocess.check_call(
[git, 'checkout', '--quiet', engine_revision], cwd=engine_path)
try:
ensure_engine()
except subprocess.CalledProcessError as e:
if e.returncode == 128: # Thrown when git gets a lock error.
time.sleep(random.uniform(2,5))
ensure_engine()
else:
raise
args = ['--package', recipes_cfg_path,
'--bootstrap-script', __file__] + sys.argv[1:]
return subprocess.call([
sys.executable, '-u',
os.path.join(engine_path, engine_subpath, 'recipes.py')] + args)
if __name__ == '__main__':
sys.exit(main())
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